Removed commented code and print statements. Added an error for no arguments
Removed commented code and print statements. Added an error for no arguments

symengine/symengine.rb,symengine/symengine.rb,abinashmeher999/symengine.rb,abinashmeher999/symengine.rb,abinashmeher999/symengine.rb,rajithv/symengine.rb,rajithv/symengine.rb,symengine/symengine.rb,rajithv/symengine.rb